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  • 论文(8)

INTERACTION BETWEEN Cu AND LIQUID Sn(II)——SEM OBSERVATION OF INTERMETALLIC GROWTH

ZHANG Qiyun , LIU Shuqi , XU Yaping Peking University , Beijing , China professor , Department of Chemistry , Peking University , Beijing , 100871 , China

金属学报(英文版)

The features of Cu_6Sn_5 growing slowly at lower temperature and growing rapidly up over 350℃,and or Cu_3Sn growing at higher temperatures,bave been detailedly observed under SEM.The increase of Pb content seems to inhibit sequentially the growth of Cu_6Sn_5 in Pb-Sn alloy....

关键词: Cu , null , null , null , null

PHASE DIAGRAM OF PrCl_3-SrCl_2-CaCl_2 SYSTEM

ZHENG Chaogui BAO Chenglin QIAO Zhiyu YE Yupu Peking University , Beijing , China 1 University of Science and Technology Beijing , Beijing , China Associate Professor , Department of Chemistry , Peking University , Beijing 100871 , China

金属学报(英文版)

Five fields corresponding to the primary crystallization of PrCl_3,Sr_3PrCl_9,α(SrCl_2, CaCl_2),α_1(CaCl_2,SrCl_2)and α_2(SrCl_2,CaCl_2)respectively,six univariant lines related to the secondary crystallization,one ternary eutectic(48.0 wt-% PrCl_3,23.5 wt-% SrCl_2; 590℃)and ternary peritectic point...

关键词: PrCl_3 , null , null , null

INTERFACIAL ACTIVITY BEHEAVIOR OF FLUX DURING ALUMINIUM BRAZING

ZHANG Qiyun LIU Shuqi LAN Tie FU Yuchuan Peking University , Beijing , China ZHANG Qiyun , Professor , Department of Chemistry , Peking University , Beijing , China

金属学报(英文版)

A study on the interfacial activity behavior of flux during aluminium brazing has been made by using metallography,SEM and electron prob techniques.The results show that the activity, of a flux is caused by the wetting of base metal with the liquid heavy metal reduced from the flux,thus,some regions...

关键词: aluminium brazing , null , null

FREE ENERGIES OF FORMATION FOR ELECTROCHEMICALLOY ALLOYED Y-Cu SYSTEM

YANG Qiqin LIU Guankun LIU Zejin Zhongshan University , Guangzhou , China YANG Qiqin , Associate Professor , Department of Chemistry , Zhongshan University , Guangzhou , China

金属学报(英文版)

The electrochemical alloying of Y-Cu system in molten NaCl-KCl-YCl_3 has been investi- gated.The free energy changes of the formation reactions of the intermetallic compounds,in- cluding YCu_6 ,YCu_4 YCu_2 ,Yfu(973—103 K),were determined by means of electrode potential-time curves of the working ele...

关键词: Y-Cu system , null , null

EFFECT OF OXYGEN CONTENTS ON OXYGEN POTENTIALS OF H_2O-H_2 AND H_2O-H_2-INERTS GAS MIXTURES

FANG Zheng CHEN Xinmin(H.M.Chen) Central South University of Technology , Changsha , China FANG Zheng , Associate Professor , Department of Chemistry , Central South University of Technology , Changsha , China

金属学报(英文版)

By taking the effect of oxygen contents into account,a new set of formulae which represents the oxygen potentials of H_2O-H_2 and H_2O-H_2-inerts gas mixtures has been derived.Classi- cal representation is only a particular case of it.Some of the variables affecting equilibrium atmosphere when trace...

关键词: gas equilibration method , null , null , null

METASTABLE CHARACTERISTICS OF β-W

HUANG Huimin CHEN Xinmin Central South University of Technology , Changsha , China HUANG Huimin Associate Professor , Department of Chemistry , Central South University of Technology , Changsha , China

金属学报(英文版)

The nature of the oxygen contained in β-W was investigated with DSC,X-ray analysis on quenched samples and Auger spectroscope.It was shown that the oxygen contained in nonpyrophoric β-W consists of the reversibly chemisorbed oxygen and the interstitial oxygen which could form an interstitial solid s...

关键词: tungsten , null , null , null

LOCAL EQUILIBRIUM METHOD IN STUDYING PHASE DIAGRAM OF Mn-MnO SYSTEM

CHEN Qiyuan Central South University of Technology , Changsha , China CHEN Qiyuan Associate Professor , Department of Chemistry , Central South University of Technology , Changsha , China

金属学报(英文版)

A special method based on the local equilibrium principle has been introduced in the research of the phase diagram of Mn-MnO system.With this method,the problems of volatilization of Mn and the corrosion of Mn and MnO to refractory materials were prevented efficiently.The solubility of oxygen in Mn ...

关键词: local equilibrium method , null , null

PHASE DIAGRAMS OF SYSTEMS SmCl_3-CaCl_2 AND SmCl_3-LiCl

ZHANG Yifeng MENG Bo GU Yunyan Northeast University of Technology , Shenyang , China Professor , Department of Chemistry , Northeast University of Technology , Shenyang 110006 , China

金属学报(英文版)

The phase diagrams of binary systems SmCl_3-CaCl_2 and SmCl_3-LiCl were determined by DTA and X-ray diffraction analysis.The system SmCl_3-CaCl_2 is of a simple eutectic type with eutectic point of 55.8mol-% SmCl_3 at 545℃.The system SmCl_3-LiCl is of the type with incongruent melting phase 2SmCl_3·...

关键词: SmCl_3-CaCl_2 , null , null